Arm Holdings plc
Held by 13 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 042068205 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns ARM?
Who added and who trimmed · Q2 2026
Estimated dollar change per manager (change in shares × this quarter's price). Click a bar to open the manager.
Who owns ARM? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Brad Gerstner | Altimeter Capital | 1.64M | $582.19M | 5.9% | Reduced | -73.5K | -4.3% | -$26.05M |
| 2 | Two Sigma | Two Sigma Investments | 660.16K | $234.07M | 0.2% | Added | +80.1K | +13.8% | +$28.41M |
| 3 | Sands Capital | Sands Capital Management | 642.83K | $227.93M | 0.8% | New | +642.8K | — | +$227.93M |
| 4 | Baillie Gifford | Baillie Gifford & Co | 441.37K | $156.49M | 0.1% | Reduced | -170.5K | -27.9% | -$60.47M |
| 5 | Ken Griffin | Citadel Advisors | 167.73K | $59.47M | 0.0% | Reduced | -121.1K | -41.9% | -$42.94M |
| 6 | Norges Bank | Norges Bank Investment Management | 45.90K | $16.27M | 0.0% | — | — | — | — |
| 7 | Stanley Druckenmiller | Duquesne Family Office | 28.09K | $9.96M | 0.2% | Reduced | -78.6K | -73.7% | -$27.87M |
| 8 | Fred Alger | Fred Alger Management | 27.64K | $9.80M | 0.0% | New | +27.6K | — | +$9.80M |
| 9 | Tom Marsico | Marsico Capital Management | 24.46K | $8.67M | 0.2% | Reduced | -8.4K | -25.5% | -$2.97M |
| 10 | David Shaw | D.E. Shaw & Co. | 5.76K | $2.04M | 0.0% | Reduced | -300.9K | -98.1% | -$106.67M |
| 11 | Ray Dalio | Bridgewater Associates | 4.92K | $1.75M | 0.0% | Reduced | -588.4K | -99.2% | -$208.64M |
| 12 | Israel Englander | Millennium Management | 2.95K | $1.05M | 0.0% | Reduced | -267.2K | -98.9% | -$94.75M |
| 13 | Ken Fisher | Fisher Asset Management | 946 | $335.65K | 0.0% | New | +946 | — | +$335.65K |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↓ |
|---|---|---|---|
| Jim Simons | Renaissance Technologies | -16.9K | $2.56M |
| Steve Cohen | Point72 Asset Management | -14.3K | $2.16M |
Politician trades
Column filters
| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↓ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cleo Fields Politician | Dec 11, 2025 | ARM | Arm Holdings plc - American Depositary Shares (ARM) [ST] | Sale | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | Self | Morgan Stanley - E*TRADE #2 | Dec 17, 2025 | 6 days | PTR ↗ |
| Jonathan L. Jackson Politician | Sep 2, 2025 | ARM | Arm Holdings plc - American Depositary Shares (ARM) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Morgan Stanley - Rollover IRA | Oct 15, 2025 | 43 days | PTR ↗ |
| Jonathan L. Jackson Politician | Jul 17, 2025 | ARM | Arm Holdings plc - American Depositary Shares (ARM) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Morgan Stanley - Rollover IRA | Aug 25, 2025 | 39 days | PTR ↗ |
| Cleo Fields Politician | Jul 16, 2025 | ARM | Arm Holdings plc - American Depositary Shares (ARM) [ST] | Purchase | $50,001 - $100,000 | Est. $75,000 (midpoint of reported range $50,001–$100,000) | Self | Morgan Stanley - E*TRADE #2 | Aug 6, 2025 | 21 days | PTR ↗ |